Mobile electric high-pressure washer

Abstract

To provide a mobile electric high-pressure washer which can perform a sludge water treatment process after cutting work of a road surface or the like with less noise than conventional ones, and which is easy to handle and reduces the burden on an operator. [Solution] A mobile electric high-pressure washer (1) having a portable power source (25), an electric water jet pump device (10), and a cleaning water tank (T) that supplies cleaning water via a water suction hose (13) connected to the water intake port (11) of the cart-like main body (3) mounted side by side without overlapping one another on top of the other on the loading platform (4).As the main body (3) moves, high-pressure water supplied under pressure from the water jet pump device is sprayed from a nozzle device (20), and sludge water from road cutting is channeled and collected in a predetermined location.

Description

[Technical Field]

[0001] This invention relates to a high-pressure washer that sprays high-pressure water onto the cutting chips and mud that are sprayed into the surrounding area when cutting road surfaces such as concrete or asphalt with a cutting machine, and then washes them away and collects them.In particular, it relates to a mobile electric high-pressure washer that is quieter than conventional engine-powered ones. [Background technology]

[0002] When repairing or expanding roads or parking lots paved with concrete or asphalt, the old concrete or asphalt is cut and then removed using a cutting machine. This cutting machine is a device that inserts a disc-shaped blade corresponding to the object to be cut downward into the road surface to be cut, and cuts the surface by rotating the blade at high speed using the power of an engine while traveling (see, for example, Patent Document 1).

[0003] In this process of cutting pavement, dust particles from the cutting chips are generated along the cutting path as the cutting progresses. For this reason, some cutting machines are equipped with a dust collection mechanism to collect the cutting chips (see, for example, Patent Document 2).

[0004] However, in reality, many cutting machines perform cutting operations while supplying cooling water to the blade, and in this case, the cutting chips and water mix together to form sludge water that spreads around the cutting line.

[0005] Some cutting machines suck up this sludge water and collect it in a water storage tank. However, if a water storage tank for collecting sludge water is installed integrally with the cutting machine, the cutting machine itself becomes large and heavy, making it difficult to handle. Therefore, a configuration in which the water storage tank is installed separately from the cutting machine has also been considered.

[0006] In this case, it has been considered to reduce the burden on the cutting machine by isolating the cooling water supply section and the sludge water recovery section and providing them in a single water storage tank (see, for example, Patent Document 3). [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Utility Model Registration No. 3052653 [Patent Document 2] Japanese Patent Application Laid-Open No. 2006-241825 [Patent Document 3] Patent No. 5468121 Summary of the Invention [Problem to be solved by the invention]

[0008] However, because sludge water tends to flow and spread around, collecting the sludge water generated while cutting with a cutting machine has a limited collection area, and the sludge water remains in the surrounding area. In this case, a separate operation is required to collect the sludge water remaining around after the cutting operation, which complicates the operation and reduces the efficiency of the entire cutting process.

[0009] Therefore, it is more efficient not to collect the sludge water during the cutting operation, but to proceed with the cutting operation for a certain distance and then stop it, and then use a water jet from a high-pressure washer to direct the sludge water generated in the area after the cutting into one place and collect it into a puddle.

[0010] The collected sludge water can be collected all at once in a short time. In this case, a mobile high-pressure washer that can be operated independently outdoors and can be used while moving is used.

[0011] Conventional mobile high-pressure washers are mounted on a platform of a cart with an engine as a power source and a pump driven by the rotational force of the engine. Water supplied from a water source is pressurized by the pump and sprayed from a cleaning gun, which is the water discharge part, connected to the pump's discharge port via a high-pressure hose.

[0012] A cleaning gun is also called a trigger gun, and the spraying of high-pressure water supplied from the pump can be controlled on and off by manually operating the trigger lever, which opens and closes an internal valve linked to the rotation of the trigger lever.

[0013] Such a mobile high-pressure washer can be moved to the destination alone, along with the tank containing the cleaning water, and by spraying high-pressure water while moving, it can direct the sludge water that has spread over a certain area after cutting into one place and collect it.

[0014] However, the engine that powers the mobile high-pressure washer produces a loud noise, which means that noise is generated not only during the cutting machine operation process but also during the process of collecting sludge water, resulting in an overall longer noise generation time.

[0015] Furthermore, the fuel tank for the engine must also be moved at the same time, making the overall structure of the washer large and heavy. Therefore, if a tank for storing cleaning water is required outside of the area where cleaning water can be directly drawn in from the water supply with a hose, a separate movable tank must be installed. In this case, it is not easy to handle the work while moving both the high-pressure washer and the tank.

[0016] Another option is to place the engine, pump motor, and other drive units together with the fuel tank on top of a housing-like tank container equipped with wheels for mobility. However, in this case, the center of gravity of the entire device becomes significantly higher, making it prone to wobbling and tipping over when moving, making it very unstable.

[0017] This unstable structure is particularly dangerous in a relatively large device for cleaning sludge after cutting with a cutting machine, rather than a small household device, and makes the device extremely difficult to handle. The noise during operation and the difficulty in handling it as described above are a burden for the worker and can lead to a decrease in work efficiency.

[0018] In view of the above problems, the object of this invention is to provide a portable electric high-pressure washer that can process sludge water after cutting work on road surfaces, etc., with less noise than conventional methods, is easy to handle, and reduces the burden on the operator. [Means for solving the problem]

[0019] In order to achieve the above object, the mobile electric high-pressure washer according to the invention described in claim 1 is, as shown in Figures 1 and 2, a cart-like main body that can travel on wheels, and on the loading platform thereof, a portable power source, a water jet pump device that is powered by the power supply from the portable power source, and a cleaning water tank that supplies cleaning water via a water suction hose connected to the water suction port of the water jet pump device are mounted side by side without being overlapped one on top of the other, and while moving by the travel of the main body, high-pressure water supplied under pressure from the water jet pump device is sprayed from a nozzle device, and cutting chips and mud generated by road cutting are washed and collected in a predetermined location. The water jet pump device includes: a motor unit that is rotationally driven by power supplied from the portable power source; and an electric plunger pump unit that is actuated by the rotational force of the motor unit; a high-pressure hose having one end detachably connected to the discharge port of the electric plunger pump unit, The nozzle device a trigger gun to which the other end of the high-pressure hose is connected, and in which the injection and cut-off of high-pressure water supplied from the electric plunger pump unit are controlled by hand operation of the trigger lever by opening and closing an internal valve linked to the rotation of the trigger lever; and a nozzle member that is detachably attached to the discharge port of the trigger gun.

[0020] According to the mobile electric high-pressure washer of claim 1 of the present invention, as a preparation step, the high-pressure hose connection port of the trigger gun equipped with a specified nozzle member is connected to the discharge port of the electric plunger pump unit with a high-pressure hose, one end of the suction hose attached to the suction port is submerged in a cleaning tank containing cleaning water, and the other end is connected to the suction port of the electric plunger pump unit, and the power cord of the plunger pump is inserted into the output outlet of the portable power supply, and the electric high-pressure washer is ready to start operating.

[0021] Therefore, by running the main body and positioning it near the cutting start position on the target road surface after cutting with the cutting machine, high-pressure water can be sprayed from this position using the trigger gun, and sludge water containing cutting chips and the like that is spread around the cutting line can be collected.

[0022] At this time, the electric plunger pump is driven by a motor that rotates using power supplied from a portable power source, so high-pressure cleaning work can be carried out with significantly less noise than conventional engine-powered pumps.

[0023] Furthermore, while engine-powered devices require a fuel tank to be installed as an integrated unit in addition to the engine, the portable power supply of this invention does not require a fuel tank for the engine, as compared to an engine with the output required to drive a high-pressure washer of the same level.As a result, the space occupied by the drive unit of the high-pressure washer is compact and lightweight.

[0024] This makes it possible to mount the cleaning water tank alongside the drive unit without stacking them one above the other. In addition to reducing noise, the non-overlapping arrangement of the equipment results in a low center of gravity, which provides high stability and makes it easier to handle when moving the machine. This also significantly reduces the burden on the operator and improves work efficiency.

[0025] In addition, since the sludge water that has been collected to a certain extent in one place can be collected all at once using a separate suction device, cutting and road surface cleaning operations can be carried out much more efficiently than if the sludge water was collected using a suction device integrally mounted on the cutting machine while cutting work was being performed using the cutting machine.

[0026] The mobile electric high-pressure washer according to the invention described in claim 2 is characterized in that, as shown in Figure 1, the loading platform has an elastic sheet laid on its upper surface as a vibration-damping member.

[0027] According to the mobile electric high-pressure washer described in claim 2 of the present invention, the onboard equipment such as the electric plunger pump unit is mounted on the carrier of the main body via a vibration-damping sheet, which absorbs the vibrations of each piece of equipment during high-pressure washing operation, further contributing to reducing noise.

[0028] The portable electric high-pressure washer according to the invention described in claim 3 is characterized in that the capacity of the portable power source is 1000Wh to 3000Wh, and the discharge pressure of the water jet pump device is 5MPa to 10MPa.

[0029] According to the mobile electric high-pressure washer of the present invention described in claim 3, by setting the capacity of the portable power supply within the range of 1000Wh to 3000Wh, the portable power supply, which is a relatively large-capacity battery, does not become too heavy and can be kept to a more compact capacity.

[0030] Therefore, even if one worker is in charge of operating the electric high-pressure washer, including cutting work using the cutting machine, the burden on the worker will not be too great.

[0031] Furthermore, while the capacity of the portable power supply should be within the range of 1000Wh to 3000Wh, it is more preferable to have a capacity of 2000Wh or more, especially if you want to ensure at least one hour of continuous use (motor drive) of an electric high-pressure washer.

[0032] In addition, in this invention, the high-pressure water sprayed by the water jet pump device does not need to be strong enough to scrape the road surface, but it must be at least high enough to wash away dust and sludge from the road surface. By setting the discharge pressure in the range of 5 MPa to 10 MPa, dust and sludge can be sufficiently washed away from the road surface, and this can be done efficiently in a short time.

[0033] The portable power supply, water jet pump unit, and nozzle unit that make up the mobile electric high-pressure washer of the present invention can be selected appropriately in weight and size to suit the work, and can be installed interchangeably on the carrier of the main body.

[0034] For example, the nozzle device is composed of a trigger gun and a nozzle member that is detachably attached to the discharge port of the trigger gun. The nozzle member has a tubular lance of a predetermined length and an injection nozzle at the tip.

[0035] If multiple types of such nozzle members are provided, they can be selected and attached as appropriate depending on the situation of use. That is, various types can be used, such as those with different lance lengths, those with straight or curved lances, and those with a different injection axis direction relative to the central axis of the trigger gun. [Effects of the Invention]

[0036] As explained above, the portable electric high-pressure washer of this invention significantly reduces noise compared to conventional engine-powered models, and its compact and lightweight design reduces the burden on the operator, thereby improving work efficiency. [Brief explanation of the drawings]

[0037] [Figure 1] 1 is a perspective view showing the overall configuration of a mobile electric high-pressure washer according to one embodiment of the present invention; [Figure 2]2A and 2B are explanatory diagrams showing the configuration of a nozzle device in the mobile electric high-pressure washer of FIG. 1, in which (a) is a perspective view showing the components of the nozzle device in a state before assembly, and (b) is a perspective view showing the components of (a) in a state after assembly. [Figure 3] FIG. 2 is a perspective view showing the mobile electric high-pressure washer of FIG. 1 in use. DETAILED DESCRIPTION OF THE INVENTION

[0038] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0039] <Embodiment> 1 to 3 show a mobile electric high-pressure washer 1 according to one embodiment of the present invention. In this embodiment, an elastic sheet 5 is laid as a vibration-damping member on the surface of a platform 4 of a cart-like main body 3 that can travel on wheels 2, and a portable power source 25, a water jet pump device 10 that is powered by power supplied from the portable power source 25, and a cleaning water tank T that supplies cleaning water to the water jet pump device 10 via a suction hose 13 are mounted on top of the elastic sheet 5 without overlapping one another, and a nozzle device 20 that sprays high-pressure water supplied under pressure from the water jet pump device 10.

[0040] The water jet pump device 10 includes a motor section M that is rotationally driven by power supplied from a portable power source 25, and an electric plunger pump section P that is actuated by the rotational force of the motor section M.

[0041] An outlet connection part 15a at one end of a high-pressure hose 15 is detachably connected to the outlet 12 of the electric plunger pump part P. A nozzle connection part 15b at the other end of the high-pressure hose 15 is connected to a high-pressure hose connection port 23 of a trigger gun 21 constituting a nozzle device 20, and high-pressure water supplied under pressure from the electric plunger pump part P is sent to the nozzle device 20.

[0042] Meanwhile, one end of a suction hose 13 is connected to the water intake port 11 of the electric plunger pump section P, and a strainer 14 is attached to the other end of the suction hose 13. This strainer 14 is a filter, and when it is submerged in the flush water W contained in the flush water tank T, when the flush water is sucked up by the suction force from the electric plunger pump section P, it separates and removes any solid matter such as foreign matter or dirt present in the flush water W.

[0043] In this embodiment, the nozzle device 20 is made up of a trigger gun 21 and a nozzle member 24 that is replaceably attached to its discharge port. The trigger gun 21 is equipped with an internal valve (not shown) that opens and closes in conjunction with the rotation of the trigger lever 22. This internal valve is normally closed by a spring bias, but the internal valve is opened by rotating the trigger lever 22 against this spring bias, allowing high-pressure water to pass through the valve.

[0044] Therefore, when the operator 50 pulls the trigger lever 22 in a direction approaching the hand portion H of the trigger gun 21, the high-pressure water that has passed through the opened internal valve flows into the nozzle member 24 and is sprayed from its tip. Then, simply by releasing the trigger lever 22, the internal valve is closed again by the biasing force of the spring, and the spraying of high-pressure water from the nozzle member 24 is stopped. In this way, with the trigger gun 21, the spraying and cut-off of the high-pressure water supplied from the electric plunger pump portion P can be controlled simply by operating the trigger lever 22 at hand.

[0045] The water jet pump device 10 of this embodiment uses an electric plunger pump section P with a pressure of 5.7 MPa and a discharge rate of 6 to 8 L / min, and a motor section M with a rated voltage of single-phase 100 V and a rated power consumption of 1.2 to 1.4 kW. The portable power supply 25 uses a lithium iron phosphate (LiFePO4) battery cell with a weight of approximately 18 kg and a capacity of 2048 Wh, and is equipped with multiple AC output ports 26.

[0046] As a preparation step, the electric high-pressure washer 1 of this embodiment, which has the above-mentioned configuration, first stores tap water as cleaning water W in the cleaning water tank T, and then drives the washer to the vicinity of the cleaning start position of the road surface to be cleaned, which has been cut by the cutting machine.

[0047] Meanwhile, one end of a water suction hose 13 is connected to the water suction port 11 of the electric plunger pump section P, and the strainer 14 at the other end is submerged in the water of the flushing water tank T. In addition, the outlet port connection part 15a of the high-pressure hose 15 is connected to the outlet port 12 of the electric plunger pump section P, and the nozzle connection part 15b at the other end is connected to the high-pressure hose connection port 23 of the trigger gun 21.

[0048] Then, the power cord (not shown) from the motor unit M is inserted into the AC output port 26 of the portable power supply 25, and the main power supply and AC power supply of the portable power supply 25 are turned on. Furthermore, when the power switch of the motor unit M is turned on, the motor unit M is driven to rotate, and this rotational force is transmitted to the electric plunger pump unit P, and the electric plunger pump unit P starts to drive the pump.

[0049] Next, air is bled from the plunger pump section P. That is, the air bleed valve 16 is opened for a while, and after it is confirmed that cleaning water comes out of the air bleed valve 16, the air bleed valve 16 is closed.

[0050] Then, the pressure of the electric plunger pump section P is adjusted. Normally, the water jet pump device 10 is set to the maximum discharge pressure before shipping, so just before use, the pressure adjustment knob 18 is turned while watching the pressure gauge 17 to adjust the discharge pressure to the desired level.

[0051] After the above preparation steps, the worker 50 grasps the hand portion H of the trigger gun 21 of the nozzle device 20 with one hand, supports the nozzle member 24 with the other hand, determines its orientation, and pulls the trigger lever 22 toward the hand portion H and operates it, thereby spraying high-pressure water from the tip of the nozzle member 24, as shown in Figure 3.

[0052] Then, by controlling the direction of the nozzle member 24 while spraying the high-pressure water, the sludge water 200 that has spread around the cutting line 101 on the target road surface 100 can be directed and collected in one place. This collected sludge water is then collected all at once by a separate collection and suction device.

[0053] By repeating the above steps as many times as necessary while moving the electric high-pressure washer 1 at predetermined distance intervals along the cutting line 101, it is possible to efficiently collect the sludge water scattered around the entire length of the cutting line 101.

[0054] According to the electric high-pressure washer 1 of this embodiment, the noise generated during the sludge water recovery work as described above comes from the electric water jet pump device 10, so noise is significantly reduced compared to conventional engine-driven mobile high-pressure washer. In addition to this low noise, the device is easy to handle, which reduces the burden on the worker and improves overall work efficiency. [Explanation of symbols]

[0055] 1: Electric high-pressure washer 2: Wheels 3: Main unit 4: Cargo bed 5: Elastic sheet 10: Water jet pump device P: Electric plunger pump M: Motor section 11: Water intake 12:Discharge port 13: Water intake hose 14: Strainer 15: High pressure hose 15a: Outlet connection part 15b: Nozzle connection part 16: Air release valve 17: Pressure gauge 18: Pressure adjustment knob T: Cleaning water tank W: Cleaning water 20: Nozzle device 21: Trigger Gun H: Hand part 22: Trigger lever 23: High pressure hose connection 24: Nozzle member 25: Portable power supply 26: AC output port 50: Worker 100: Target road surface 101: Cutting line 200: Sludge water

Claims

1. A portable electric high-pressure washer is provided on the platform of a cart-like main body that can travel on wheels, and is arranged side by side without overlapping one another, with a portable power source, a water jet pump device that is powered by the power supply from the portable power source, and a cleaning water tank that supplies cleaning water via a water suction hose connected to the water suction port of the water jet pump device, and the main body moves as it travels, spraying high-pressure water supplied under pressure from the water jet pump device from a nozzle device, thereby washing and collecting cutting chips and mud generated by road cutting in a predetermined location, The water jet pump device includes: a motor unit that is rotationally driven by power supplied from the portable power source; and an electric plunger pump unit that is actuated by the rotational force of the motor unit; a high-pressure hose having one end detachably connected to the discharge port of the electric plunger pump unit, The nozzle device a trigger gun to which the other end of the high-pressure hose is connected, and in which the injection and cut-off of high-pressure water supplied from the electric plunger pump unit are controlled by hand operation of the trigger lever by opening and closing an internal valve linked to the rotation of the trigger lever; A portable electric high-pressure washer characterized by comprising: a nozzle that is detachably attached to the discharge outlet of the trigger gun.

2. 2. The mobile electric high-pressure washer according to claim 1, wherein the loading platform has an upper surface on which an elastic sheet is laid as a vibration-isolating member.

3. 3. A mobile electric high-pressure washer according to claim 1, wherein the capacity of the portable power source is 1000 Wh to 3000 Wh, and the discharge pressure of the water jet pump device is 5 MPa to 10 MPa.

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